Built In Reachargeable Li-on Battery:No AAA batteries Needed for this blood pressure cuff,with a built in Reachargeable Li-on Battery,you can charge the device via a phone charger,a computer,or a powerbank,save money for batteries.

Instant Measurements&Easy to Use:all the measuring process runs automatly upon pressing one button.the systolic and diastolic blood pressure readings as well as the heart rate will all be displayed on the LCD Screen.